Main line: Hashimoto Utaro
Variations: unkx80, Dieter
This is what the book provides as the main line. White 7 makes miai of a and b.
Black can only almost fill White's eyespace with bent four or twisted four. These are living shapes. The result is seki. White a is sente.
The points marked a are miai. So are the points b and the points c.White is alive.
If White 3 to Black 2, the monkey jump to 4 destroys the eyeshape
Another wrong answer to Black 2. a and b are miai for the kill.